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H. E. SIVIYTHE'.

coNTmuous FuRNAcE. l APPLICATION FILED IAN. 23. I9I9. 1,3102846,Patented July 22, 1919 -4 SHEETS-SHEET I.

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H. E. SMYTHE. CONTINUOUS FURNACE.

H. E. SMYTHE.

CONTINUOUS FURNACE. APPLICATION FIL ED JAN. 23| |919.

Patented July 22, 1919.

4 SHEETS-SHEET 3.

INVENTOH.

H. fyswfyHE. CONTINUOUS FURNACE.

APPLICATION FILED JAN- 23 I9I9 1,310,846. mentedJu1y2g1919- 4SHEETS-'SHEET 4.

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JEn lsTATizs HORACE E. sMYTHE, OP PITTSBUBGHQPENNSYLVANTA, AssIGNOE. ToTHE s. n.. sMYTHE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OFWEST VIRGINIA.

CONTINUOUS EUnNACE Specification of Letters Patent.

Patented July 22, 1919.

Application med January 2s, 1919. sei-181m. 272,646.

To ad lwhom t may concern.'

Be it known that I, HORACE E. SMYTHE, a citizen of the United States,residing at Pittsburgh, inthe county of Alleghen and Statel ofPennsylvania, have invente new and useful Improvements in ContinuousFurnaces, of which the following is a speciication.

My invention relates to continuous heating furnaces, preferably heatedby gas.4

One object of this invention is to provide a novel means for feedingmetal articles, as

taken on the line I--I, Fig. 3; Fig.2, a

horizontal section on theline II-II, Flg. 1; Fig. 3 .is a verticalcross-sectionon the line IIL-III, Fig. 1; Fig. 4, a verticalcrosssection on the line IV-IV, Fig. 1; and Fig. 5, a fragmentary viewshowing in vertical longitudinal section a ortionof a furnace embodyinga modification of that shownin the'preceding views. A

The furnace has thehearth 1, the roof 2, the sides 3 and 4, the frontend 5, and kthe back end 6. The back end has the charging door 7 and thefront andthe discharging door 8, for the metal to be heated. The

front portion of the roof 2 is made double or hollow to provide the airflue 9, which has its forward end communicated by the inlets 10 with thefront end of the furnace chamber 11. Air is fed to the flue 9 by one ormore pipes 12 leading from a blower or the like 13.

14 is a gas-supply main connected to the chambers 15, the admission ofgas to each chamber being controlled by a valve 16 (only one beingshow-n, Fig. 1) operated by a chainor rope 17, which asses over thesheave 18. A. pipe 19 leads rom each valve chamber 15 to a gas inlet 20at each side 3 and 4, near `the front end 5 and the air inlets 10.

A short distance from the rear end of the furnace, for example, aboutone-fourth of the length of the hearth from the rear end, I `provide theopenings 21, each connected by a flue 22 leading up to the pipe`23 whichconveys the waste or spent gases to a stack, not shown.

The hearth 1 of the furnace is composed of a number of spaced stationarylongitudinal sections 24 with a longitudinally and horizontally movablesection 25- between ad- ]acent sections 24. The movable sections are-channeled above and lengthwise and supported on the metal pieces 26arranged in. transverse rows below the hearth 1, each row beingconnected together by a crosssupport 27, having near each end a downwardextending lug 28. The lugs 28 are arranged upon the traveling girders orbars 29, tied together by the cross-bars 30. The connected bars 29 arepivotally connected by the links 31 to the piston 32 of the hydraulic orother power cylinder 33.

Beneath the bars 29, ,I place a number of transversely arrangedrock-shafts 34, each provided at each end with a short arm 34 which isconnected to an adjacent cross-bar 27 by a link 36. The ends of therock-shafts are Journaled in the bearings 37 supported on the pillars38. The central portion of each shaft is provided with a downwardlyextending arm' 39 pivoted to the horizontal bary 40. The rear end of thebar 40I is supported by the link 41 swinging on the pivot 42, andconnected b the links 43 to the piston' 44 of the hy raulic or otherpower cylinder 45. The stationary sections 24 of the hearth aresupported on the transverse girders or bars 46.

The commingling air and gas from the inlets- 10 and 20 vbegin to burn atthe front end of the furnace-chamber 11 and flow rearwardly to theOutlets 21 and the stack flue 23, the air inthe Hue 9 being preheated bythe roof 1 in a very economical andy eiiicient manner. In the form ofmy'invention shown on Figs. 1 to 4, the articles 47 are fed lengthwiseso'as to lie in` the depressions between the stationary sections of thehearth and over the movable sections thereof. The

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varticles are fed step by step along the hearth as follows: Power isapplied to the piston 44 to cause the bar 40 to'be moved to' the rear,which causes the movable sections of the hearth to rise so as to thearticles 47 above they stationary sections of the hearth. Then thepiston .32 of the cylinder tions, ready is actuated so as to move thebars 29 and the movable sections 25 toward the front 1o of the furnace;Then the piston 44 is moved, oli. allowed to move by the weight of thearticles 47, to the right, the articles again restf upon the stationaryIsections of the hearth. Finally the pistonl 32 is moved back to theright, brin 'ng `the movable sections of the hearth bac to theirrearmost posifor a new cycle-of operations.

I locate the outlets 2l a distance from the rear end of the furnace asaforesaid, in order to provide a relatively cool place of rest for thearticles 47 where the molecules thereof ma return to'their normalpositions and be -neath the hearth, where the operating mechanism forthe members 25 is located. 50 is a door closing the rear end of the pit.

I clai1n 1. In a heating furnace, a hearth comprising parallel`stationary and movable members, the latter being arranged between thestationary members, upright and oscilla-table in' directicns parallelwith the length of the' said members, means pivoted to the other end of'the links for elevating the links so as to move the movable memberabove the stationa members, and means for causing the mova le member totravel longitudinally and the links to oscillate while they support themovable member in its elevated position.

2. In a heating furnace, a hearth comprising parallel stationary andmovable members, the latter being arranged between the stationarymembers, upright links pivoted at one end to the movable member andoscillatable in directions parallel with thelength of the said members,shafts having arms pivoted to the other end of the links for elevatingthe links so as to move Vthe movable member above the stationarymembers, 'and means for causing the movable member to travellongitudinally and the links to oscillate While they support the movablemember in its elevated position.

Signed at Pittsburgh; Pa., this 15th day of January, 1919.

- HORACE E. SMYTIJIE.v

links pivoted at one end to the movable member

